Nowadays it is widely accepted to formulate the security of a protocol carrying out a given task via the "trusted-party paradigm," where the protocol execution is compared with an ideal process where the outputs are computed by a trusted party that sees all the inputs. A protocol is said to securely carry out a given task if running the protocol with a realistic adversary amounts to "emulating" the ideal process with the appropriate trusted party. In the Universal Composability (UC) framework the program run by the trusted party is called an ideal functionality. While this simulation-based security formulation provides strong security guarantees, its usefulness is contingent on the properties and correct specification of the ideal functionality, which, as demonstrated in recent years by the coexistence of complex, multiple functionalities for the same task as well as by their "unstable" nature, does not seem to be an easy task. In this paper we address this problem, by introducing a general methodology for the sound specification of ideal functionalities. First, we introduce the class of canonical ideal functionalities for a cryptographic task, which unifies the syntactic specification of a large class of cryptographic tasks under the same basic template functionality. Furthermore, this representation enables the isolation of the individual properties of a cryptographic task as separate members of the corresponding class. By endowing the class of canonical functionalities with an algebraic structure we are able to combine basic functionalities to a single final canonical functionality for a given task. Effectively, this puts forth a bottom-up approach for the specification of ideal functionalities: first one defines a set of basic constituent functionalities for the task at hand, and then combines them into a single ideal functionality taking advantage of the algebraic structure. In our framework, the constituent functionalities of a task can be derived either directly or, following a translation strategy we introduce, from existing game-based definitions; such definitions have in many cases captured desired individual properties of cryptographic tasks, albeit in less adversarial settings than universal composition. Our translation methodology entails a sequence of steps that derive a corresponding canonical functionality given a game-based definition. In this way, we obtain a well-defined mapping of game-based security properties to their corresponding UC counterparts. Finally, we demonstrate the power of our approach by applying our methodology to a variety of basic cryptographic tasks, including commitments, digital signatures, zero-knowledge proofs, and oblivious transfer. While in some cases our derived canonical functionalities are equivalent to existing formulations, thus attesting to the validity of our approach, in others they differ, enabling us to "debug" previous definitions and pinpoint their shortcomings.
Péter Halmai, Viktória Vásáry, Halmai, Peter, Vasary, Viktoria
Is the Common Agricultural Policy unsustainable? Is agricultural spending a major distorting factor in the EU economy and an obstacle to the implementation of the Lisbon agenda? To answer these complex questions, detailed analysis is required along the following lines of thought: 1. Exploration of factors justifying Community level intervention. – Is the ’theory of decentralization’ applicable to budgetary issues and the common agricultural policy? Our hypothesis suggests that it is. 2. Assessing CAP as it currently exists, including its ability to generate public goods at the level of the Community (multifunctional elements which are indeed cross-border externalities) and its ability to create added value at the level of the Community. 3. Making an attempt to redefine the Community’s agricultural policy by identifying goals which can be achieved more effectively at the supranational level rather than by involving secondary levels of decision making. – Making an attempt to outline a Common Rural Policy, a new policy intended to promote the creation of public goods required by the society by means of targeted and decoupled economic policy measures. The concept of the new policy – a new policy requiring both national and Community funding – is in line with the requirements of sustainable development, i.e. sustainable agricultural activities such as sustainable land use, food and feed production, biofuels, forestry and fishing. Additionally, the new policy we outlined may also be an effective approach to meeting challenges arising from globalisation, trade liberalization, climate change and structural reform issues. ----------------------------------------- Fenntarthatatlan a Közös Agrárpolitika? Torzítják a mezőgazdasági kiadások az EU gazdaságá¬nak fejlődését, gátolják a Lisszaboni stratégia végrehajtását? Ezekre a bonyolult kérdésekre a követ¬kező pontok részletes elemzésével adhatjuk meg a választ: 1. A közösségi szintű beavatkozást igazoló tényezők feltárása, rendszerezése. – Alkalmazható a „decentralizációs elmélet” a költségvetési kérdések, illetve a közös agrárpolitika vonatkozásában? Hipotézisünk szerint: igen. 2. A KAP értékelése – figyelembe véve az EU-szintű közjavak (a multifunkcionális elemek va-lóban határokon átnyúló externalitások) és EU-szintű hozzáadott érték előállítására vonatkozó képességet. 3. Kísérlet az EU agrárpolitikájának átalakítására annak segítségével, hogy felmérjük, mely cél-kitűzések valósíthatóak meg eredményesebben szupranacionális szinten, és nem pedig másodla¬gos döntési szintek bevonásával. – Kísérlet a Közös Vidékpolitika körvonalazására, amely új poli¬tika célzott és szétválasztott szakpolitikai intézkedések segítségével járul hozzá a társadalom által megkívánt közjavak előállításához. Az új politika koncepciója – annak az új politikának a koncepciója, amely mind nemzeti mind Kö¬zösségi szintű finanszírozást is igényel – összhangban van a fenntartható fejlődés – azaz a fenntart¬ható mezőgazdasági tevékenységek: fenntartható földhasználat, élelmiszer- és takarmány-előál¬lítás, bioüzemanyag, erdészet és halászat – követelményeivel. Továbbá az általunk felvázolt új po¬litika megfelelően kezelheti a globalizációval, kereskedelem-liberalizációval, klímaváltozással és strukturális reformmal kapcsolatos kihívásokat.
Open access
Regional Development and Policy
Hungarian Social, Economic and Educational Studies
Decentralization of public responsibilities implies also financial decentralization. The effect of this process in EU countries’ budgets is important to be evaluated in order to correlate with macroeconomic indicators. From financial point of view, local revenues and expenditures and the balance of local budgets constitute the main research theme. Different experiences and realities reached under the same normative framework (European Charter of Local Self-Government) are analyzed in this paper.
By the early 1890s, the Japanese government had built centralized institutions to collect indirect taxes on alcohol and manage government finance. This institutional development helped the Japanese government safeguard the convertibility of the banknotes issued by the Bank of Japan and raise long-term domestic borrowings. The new centralizing institutions greatly enhanced the capacity of the Japanese state and paved its way to become a rising power in Asia after defeating China in 1894 and Russia in 1905. How shall we account for this institutional achievement which contrasted sharply with the fiscal decentralization and low creditworthiness of government borrowing only two decades earlier?
Pointed comparative description separate rice of the systems of of public welfare of Ukraїni and some foreign powers; certainly advantages and failings in adjusting of the domestic system of public welfare of 90th years and the features of financing of social sphere of at are analysed modern terms of decentralization of management.
The process of gradual administrative and political decentralization in Bulgaria started in 1991 with the adoption of the Local Self-Government and Local Administration Act, but the real financial decentralization process started in the beginning of 2003 with the adoption of a comparatively clear expenditure assignment and introduction of a transparent and predictable intergovernmental transfer system. Basically, a key issue in the design of fiscal federalism is the financing of subnational governments. Because of the advantages of taxation at the central level and spending at the decentralized level during the transition period Bulgaria has often ended up with vertical and horizontal fiscal imbalances. In most of the fiscal years the decentralization of expenditures was not accompanied by equivalent revenue-raising responsibilities and the taxable base was unevenly distributed within the country territory. The purpose of this paper is to study and critically analyze the financial decentralization reform in Bulgaria, outlining the key achievements and basic weaknesses of the local taxation and the intergovernmental fiscal relations. Key words: financial decentralization, local finance, intergovernmental fiscal relations, local
In today’s economic crisis in which banks do not have or do not want to give money to loan, the traders do not have resources to develop or even to continue their business; therefore, there remain only a few reliable sources of financing for Romania, international financial institutions (such as the International Monetary Fund, World Bank) and the European funds. For Romania, a possible chance to overcome the crisis is the absorption in a larger proportion of European funds. So far, the absorption of European funds was low. The work highlights the current use of these funds. In the last two years, were allocated structural funds worth EUR 3.1 billion of which were absorbed only EUR 203 million. Although we have a small budget in agriculture, compared to the financial needs of this area within a year of anticrises measures, the European Commission has penalized us with nearly EUR 8.4 million, the money will be borne by the state budget for APIA delays in surface payments. Also, the Sapard payments are suspended because of the shortcomings of management and control. The article analyses the existing obstacles in accessing European funds; bureaucracy, lack of decentralization, cumbersome regulations and long procedures causes a very low capacity to absorb money from the EU. An efficient use of European funds might be to Romania in general and for the Romanian agriculture in particular, a solution to exit the crisis. The work highlights the main ways to increase access to European funds.
According to the World Bank, over 80 countries currently plan some form of fiscal decentralization. This group includes Japan, a highly centralized tax state, which in 1995 put in place a law and associated high-profile institutions to promote fiscal and administrative decentralization. But the process in Japan has quickly become bogged down. This dissertation asks why there are hurdles confronting fiscal decentralization in Japan. My research uses the fiscal sociology approach and highlights bureaucratic interests in Japan's intergovernmental tax regime, one that is especially interesting in comparison with other advanced industrial countries. Fully 70 percent of all government spending in Japan is done by subnational levels of government, and 51 percent of the central state's current operating expenditures are transfers downward that serve to support that high rate of local spending. And though Japan is a centralized state, over a third of its taxation is collected locallly. In consequence, Japan is quite anomalous when set alongside a representrative sample of federal and unitary states. No other country among the nine OECD nations used, for comparative purposes, in this dissertation combines such high fiscal transfers with heavy levels of subnational spending and taxation. And no other country gives close control over a large terrain of subnational taxation to a central-state agency (the Ministry of Home Affairs). The ministry's vast bureaucratic turf brings it into conflict with the Ministry of Finance, as both seek to maintain or expand their fiscal jurisdiction. They are thus not interested in fiscal decentralization in large part because they are busy fighting "trench wars" with each other on these tax fields. This dissertation hence undertakes a detailed analysis of intergovernmental fiscal history in Japan, focusing in particular on the Ministry of Home Affairs' ambiguous role in the Japanese state. The case studies of inter-bureaucratic fiscal politics include the Local Allocation Tax (a large general subsidy) as well as an array of taxes on the fields of income, assets and consumption.
China has the largest urban public transport sector in the world. In principle, strategic policy is determined by the central government, and passed down through the organs of state for implementation. In recent years that strategy has included giving priority to public transport and reforming the supply arrangements to secure a more commercial and competitive sector. In practice, responsibility for implementation is completely decentralized, with municipalities having both complete responsibility for financing urban public transport and substantial freedom to interpret central government guidance at the local level. This paper considers the reforms that have already occurred under this regime, the constraints and limitations on the reform process, and the most recent initiatives being undertaken. It shows that a very wide range of systems are being experimented with simultaneously, with so far no sign that central government would intervene in detail or to provide central government finance specifically for the sector.
In this paper, we prove classical coin-flipping secure in the presence of quantum adversaries. The proof uses a recent result of Watrous [Wat09] that allows quantum rewinding for protocols of a certain form. We then discuss two applications. First, the combination of coin-flipping with any non-interactive zero-knowledge protocol leads to an easy transformation from non-interactive zero-knowledge to interactive quantum zero-knowledge. Second, we discuss how our protocol can be applied to a recently proposed method for improving the security of quantum protocols [DFL+09], resulting in an implementation without set-up assumptions. Finally, we sketch how to achieve efficient simulation for an extended construction in the common-reference-string model.
Digital signatures are fundamental cryptographic primitives. They are useful as a stand-alone application and building blocks of complex cryptographic systems. Accumulators are another useful cryptographic primitive which provide a way to combine a set of values into one short value. They are useful in improving efficiency of cryptographic systems. In particular, these two primitives are key components in privacy-preserving cryptographic systems. In this thesis, we study the use of digital signatures and accumulators in cryptographic applications. We design digital signature schemes and accumulators with different features that are suitable for a wide range of applications. We are interested in privacy-preserving cryptographic applications including anonymous electronic cash systems, anonymous authentication schemes and anonymous credential systems. We construct three different digital signature schemes, each with distinctive features. We also propose two novel constructions of accumulators. Based on our signature schemes and accumulators, we design two compact electronic cash schemes and a divisible electronic cash scheme. All our schemes are truly anonymous, meaning that privacy of the users is well-protected. We also explore other applications of our newly proposed signatures and accumulators. Specifically, we give a construction of k-times anonymous authentication schemes and attribute-based anonymous credential systems. During the course of the development of the thesis, we generalise existing techniques of zero-knowledge proof-of-knowledge protocol of double-discrete logarithms into zero-knowledge proof-of-knowledge protocol of representation of a committed value. Our protocol is compatible with existing zero-knowledge proof-of-knowledge protocols that demonstrate relationship amongst discrete logarithms. We believe that this protocol, together with the newly introduced primitives, are of independent interest.
We propose a distributed key generation protocol for pairing-based cryptosystems which is adaptively secure in the erasure-free and secure channel model, and at the same time completely avoids the use of interactive zero-knowledge proofs. Utilizing it as the threshold key generation protocol, we present a secure (t,n) threshold signature scheme based on the Waters' signature scheme. We prove that our scheme is unforgeable and robust against any adaptive adversary who can choose players for corruption at any time during the run of the protocols and make adaptive chosen-message attacks. And the security proof of ours is in the standard model (without random oracles). In addition our scheme achieves optimal resilience, that is, the adversary can corrupt any t<n/2 players.
The work paper highlights the evolution of the public financial decentralization in Romania, based on analysis of legislative changes that occurred after 1991.These changes have had an important impact on local budgets and on local government responsibilities. In the context of increasing local financial independence, local authorities had to demonstrate their ability to take on the tasks of local interest from central government powers. The effect is prompt and timely response to citizen needs.
The right to participation is the "the right of rights"--the basic right of people to have a say in how decisions that affect their lives are made. All legally binding international human rights treaties explicitly recognize the essential role of participation in realizing fundamental human rights. While the substance of the human right to health has been extensively developed, the right to participation as one of its components has remained largely unexplored. Should rights-based health advocacy focus on participation because there is a relationship between an individual's or a community's active involvement in health care decision-making and the highest attainable standard of health? In the context of the human right to health, does participation mean primarily political participation, or should we take the right to participation to mean more specifically the right of persons, individually and as a group, to shape health care policy for society and for themselves as patients? Decentralization of health care decision-making promises greater participation through citizen involvement in setting priorities, monitoring service provision, and finding new and creative ways to finance public health programs. Between 1999 and 2008, Indonesia decentralized health care funding and delivery to regional governments, resulting in substantial exclusion of its poor and uneducated citizens from the health care system while simultaneously expanding the opportunities for political participation for educated elites. This article explores the tension between the right to participation as an underlying determinant of health and as a political right by reviewing the experience of Indonesia ten years after its decision to decentralize health care provision. It is ultimately argued that rights-based advocates must be vigilant in retaining a unified perspective on human rights, resisting the persistent tendency to separate and prioritize the civil and political aspects of participation over its social component.
As well illustrated by the litigation in Brown v. Board of Education, it is incumbent on the Supreme Court to identify the empirical frame of reference it uses to evaluate the constitutionality of some challenged action. In Brown, this required the Court to determine whether the proper frame of reference through which to measure constitutionality were the general effects of segregation, or whether constitutionality had to be assessed based on segregation's effects on the children involved in the specific cases before the Court. The Court chose the general frame, thus invalidating school segregation generally. This framing problem occurs throughout constitutional law, though the Court has given it little attention. Indeed, in the one context in which the Court has considered the matter, it has largely misunderstood what was at stake.\nSpecifically, the Court has signaled that it considers facial challenges to be highly unusual and suspect and that the more appropriate form of constitutional litigation is through as-applied challenges. Thus, the Court has sometimes stated a presumption in favor of individual adjudication, rather than the at-large form that occurred in Brown. Inherent in this approach is the Court's apparent belief that the constitutional issues presented in facial challenges are the same as those presented in as-applied challenges, just many times more numerous. But this is demonstrably not so, since the form of proof differs fundamentally in the two. The form of proof inevitably affects the substantive outcomes in constitutional cases. This Article argues that the decision regarding what empirical frame of reference to be used in constitutional cases should be an explicit component of constitutional interpretation. It describes the factors that should be considered in making that determination.